My question to you,is what components do I need to create a almoust similar console,that can allow better graphichs?
Please tell me where can I buy the parts?
You could go 32-bit, or you could stick with 8/16-bit. 8 and 16 bit consoles usually require you to program directly in assembler. I'm assuming you don't want to make every game in assembler.
So, you can just get a hold of a breadboard, and wire up a simple motherboard with a 32-bit processor. After that, program that with assembler (or get some open source code off the web), then you can get some sort of C/++ compiler and write in that. You may have to occasionally switch back to assembler to do some high performance things.
So yea, it requires a lot of assembler and hardware-level knowledge.